DebugPoint published a tutorial about how to move a Virtual Machine Image to another host using GNOME Boxes. 

Move Virtual Machine Image to Another Host Using GNOME Boxes

This guide explains the steps you need to move Virtual Machine Image to Another Host Using GNOME Boxes. GNOME Boxes is a virtualization utility created by the GNOME project. This utility works as a front end for libvirt. libvirt is an open-source API, daemon, and management tool for managing platform virtualization.

Move Virtual Machine Image to Another Host Using GNOME Boxes